Charlton Athletic's Stephen Henderson, 28 and Benfica's Hildeberto Pereira, 20, will fill the respective voids it is claimed, with the latter said to be undergoing a medical ahead of a season-long loan move.

Henderson, on the other hand, remains under contract with the Addicks, though the report states he'll be allowed to leave a year early as the club looks to shed their wage bill after relegation to League One.

Henderson is Charlton's only senior shot-stopper

The Irishman, however, is currently the only senior goalkeeper on the London club's books, following the sale of Nick Pope to Burnley this week.

It is unclear if Forest will be required to pay a fee for Henderson, formerly of Bristol City, Portsmouth and West Ham United.

Hildeberto, who is yet to appear for Benfica's first team, can play in a variety of positions, including in central midfield, on the wing or up front.

He has also been capped by Portugal at under-18, 19 and 20 levels.

Forest, who've signed Apostolos Vellios and Thomas Lam so far this summer, are also said to be keen on Damien Perquis, however, their interest in the Polish centre-back is reportedly not as advanced.